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PODotNetOpenAuth Twitter API Version 1.1 calls in MVC4
 

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    <p>I am writing an MVC4 Web Application that has to query the Twitter Version 1.1 API. Built into MVC4, I can use the "Sign in with Twitter" function when I just activate <strong>OAuthWebSecurity.RegisterTwitterClient</strong> in <strong>AuthConfig.cs</strong>. This then authenticates the Twitter login, but what I want to do is authorize the user so that I can make API v1.1 calls on behalf of the user.</p> <p>I have found <a href="https://stackoverflow.com/questions/13034084/mvc4s-dotnetopenauth-twitterclient-sample-does-not-respect-prior-login">this post</a> on Stack Overflow which uses custom classes to address something different (the force_login parameter issue), but I have used these classes and changed the <strong>UserAuthorizationEndpoint</strong> to point to <strong>oauth/authorize</strong>. I changed this line of code:</p> <pre><code>UserAuthorizationEndpoint = new MessageReceivingEndpoint("https://api.twitter.com/oauth/authenticate", HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest), </code></pre> <p>to this:</p> <pre><code>UserAuthorizationEndpoint = new MessageReceivingEndpoint("https://api.twitter.com/oauth/authorize", HttpDeliveryMethods.GetRequest | HttpDeliveryMethods.AuthorizationHeaderRequest), </code></pre> <p>It works for the authorization, which means now my application authorizes the Twitter user. However, when I make calls to the API v1.1, I get the '(401) Unauthorized' error. This is the code I use for the call:</p> <pre><code>var var1 = WebWorker.PrepareAuthorizedRequest(new MessageReceivingEndpoint("https://api.twitter.com/1.1/followers/ids.json?cursor=-1&amp;screen_name=sitestreams", HttpDeliveryMethods.GetRequest), accessToken); var var2 = var1.GetResponse(); </code></pre> <p>I think I also need the <strong>oauth_token_secret</strong> for the call to be authorized. Can DotNetOpenAuth give me the <strong>oauth_token_secret</strong>? Can I then use <strong>WebWorker.PrepareAuthorizedRequest</strong> to also send the <strong>oauth_token_secret</strong>?</p> <p>I have also found <a href="https://stackoverflow.com/questions/12198734/getting-twitter-access-secret-using-dotnetopenauth-in-mvc4">this post</a> on Stack Overflow which says I can't use DotNetOpenAuth for this. However, the DotNetOpenAuth code has been updated since, and I want to know if it now caters for what I want to do, which is in essence a very simple thing: allow a user to login on my web application using Twitter, and then allow my web application to see the user's followers.</p> <p>So it boils down to this: Can I use <strong>DotNetOpenAuth</strong> in MVC4 to authorize the user and then call the Twitter API v1.1 on the user's behalf, for instance to <em>GET followers/ids</em>. If possible, how do I do it?</p>
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